Stapling machine



Dec. 9, 1 24- V 1,518,925

R. H. HEYN ET AL STAPLING MACHINE Filed May '7, 1925 '2 Sheets-Sheet 1 Dec, 9, 1924. 1,518,925

R. H. HEYN ET AL STAPLING MACHINE Fi1ed May 7, 1923 2 Sheets-Sheet 2 INVENTORS A TTORNEYS Patented Dec. 9, 1924.

v isiaazi UNITED. STATES PATENT OFFICE.

ROMAN" HENRY HEYnAnnrnInoLIN" rot'znn; or noRwALK, CONNECTICUT.

STAPLING- Application filed May 7,

Tacit-whom it may concern:

Be it known. that we, ROMAN HENRY HEYN and FRIDOLIN Ponznn, both citizens of the United States and residents of Norwalk, county of Fairfield, and State of Connecticut, have invented certain new and useful; Improvements in stapling .Machines, of which the following is a specification.

Our invention. relatesto an improvement in stapling machines adapted forv driving pie-formed staples and clinchingthe same.

. Fig. 3 is a section taken substantially on the line 3-.3 of Fig. 1;

Fig. 4 shows the machine of Fig. 1 in perspective; and i i Fig. 5 shows themachine taken down.

Referring to the drawings in detail l designates the housing of the machine within which the various parts of the machine,

such as the feeding mechanism, plunger and straightener, etc. are mounted. The housing is pivotally and removably mounted upon a base ,2, being secured thereto by a screw 3 passing through ears 4: on the base and thee-nd of aslide or cutting bar 5 which is detachably secured to the housing by two screws 6 and Hpassing through the holes 8' and 9 in the cutter bar and holes 10 and 11 in the'ho-using.

The cutter bar is provided at each side with laterally-extending portions or flanges 12 for a purpose to be referred to hereinafter. i y i The housing 1 is provided adjacent its forward end with a. vertically extending guideway or channel formed as indicated atl3 and 14 so as to receive andvuide a plunger 15 and its side flanges 16. The rear face of the plunger is: provided with a cam lug 17 which is adapted to strike a removable pin 18 by which the'upward movement of the plungeris limited. This pin or stop as just pointed out is removable to permit of withdrawingof the plunger entirely from the MACHINE 1923. Serial" No. 637,214.

housing. Tiheupper end ofthe plunger carries a cap. or hand piece 19 by which the plunger is operated: A

Thehousingil is also provided with a-veradapted to mo'veparallel-with the plunger 15. The straightener isprovided with legsv 22 and 23 which straddle the cam lug 17, 1 and'thev fOlWdl-dfilld. of the cutter bar 5, the" straightener when moving downwardly passing betweenthe first staple 24and' the second staple 25 of the stripr26 to straighten the forward staple or prevent it frombe+ coming "bent as the case maybe. The face of the legs of the straightener-"also function as aguide for the rear edgeof the staple"?! after thesame has" been secured by the plunger and is traveling down theplunger guideway ahead of the plunger.

The'upper end of the straightener is provided with flanges 27 and 28 extending at right'angles to'the face of the straightener these flanges lyingagainst the edges or sides of the plunger, and with ears 29 and 30 projecting above the straightener. These ears" .may be said to be a continuation or extensionof the flanges 27 and 28, these flanges being given a reverse bend so to speak to provide a seat 31 for a short coil sprin 32 which surrounds the plunger and] W ose upper end bears against the under side of the cap or hand piece 19.

The plunger spring is designated 33 this spring surrounding. both the plunger and straightener, its lower end bearing against; thetop of thehousing 1 while its upper end bears against the'under side of the seat or reverse bend 31 of'the straightener.

.The housing 1 is provided with a sight opening 34 in the front thereof'through which the operation ofthe machine may be observed and with slots 35 in register with each other'for cleaning the machine should the staple be bent so as toprevent movement of the same.

The cutter bar 5 which we have already referred to is provided with a'bevelled p01 tion 36 at its forward end to provide acut-' tingedge 37 and with a cut-away portion 38 the latter permitting of a staple which is abnormally bent to fall down between'the cutter bar and the housingand out'through the bottom "of the latter.

Supported within the housing 1 and re- I movably secured thereto is a shell or housing comprising side members and 40. The side member 39 is provided with a pair of pins41 which pass through the holes 42 in the cutter bar and holes 43 in the side member of the shell. The pins 41 as just pointed out hold the cutter barin the shell, and the shell itself together with the cutter bar will be held in the housing 1 by the screws 6 and '2' already referred to. The side members 39 and 40 are also provided with openings 44 and 45 which register with the openings 35 already referred to in the housing.

Removably and pivotally mounted on a pin or stud 46 carried by the side member 39 is a hold-back lever 47 the forward end of which is adapted to rest upon the staple strip betweenthe second staple 25 and thlrd staple 48. The purpose of this holdeback is to prevent rearward movement of the staple strip when the feeder pawl 49 is moving rearwardly tostaple-feeding positlon. The hold-back 47 is held down in operative position by a spring 50 provided with eyes 51 which slip over the pin 46. v

The feeder pawl 49 is more or less of channel formation and is wide enough between itsfianges to straddle the hold-back 47, as will be apparent from an inspection of Fig. 1. The forward end of the feeder pawl is provided with extensions 52 which engage :behind the second staple 25 on the strip. The feeder pawl is pivotally mounted on one arnr53 of feeder cam 54,. this cam being remova-bly mounted on pin 54 supported in the side member 39. The feeder cam is provided with another arm 55 projecting into the path of the cam 17 the upper side of this arm being inclined or beveled to correspond with the inclined under side 56 of-the cam 1'7. The feeder pawl 49 is held down in position by a small coil spring,

56 between the under side of the lever arm 54 and the shoe, this spring being removably attached to the arm 54 by hooking the end of it through a hole in the arm for that purpose, andremovably attached to the feeder pawl by a struck-up portion or prong 57 on the pawl; The cam lever 54 is held in the positionshown in Fig. 1 by a coil spring 58 removably secured to the arm 53 by hooking it through a hole provided thereon for that purpose. The other end of the spring is supported by the reduced end of a small lug provided with shoulders 60 against which the spring abuts. This lug is removably mounted on the pin -61 provided for that purpose in the side member 39.

In order that the staple strip may be withdrawn at any time if desired we provide a locking lever 62 pivotally and removably mounted on the pin 63, the face of this lever engaging the tail 64 of the hold-back lever.

By pressing downwardly on the end 65 of the locking lever the front end of the holdbacltlever and feeder pawl may be raised clear of the staple strip to permit Withdrawal of the same.

It will be seen from the foregoing that we have provided a stapling machine which may be readily assembled or taken down as the case may be. We may here mention that in assembling the shell composed of the side members and 40 the pins on the sidemember 39 on which the operating parts are mounted serve to properly position the two side members as well as preventing their relative displacement in a plane transverse to the pins. In the side member 39 of the shell is an opening 66 and in the member 4.0 is an opening 67, these openings receiving the spring V The operation of the machine is so obvious as to hardly require explanation.

l-Vith the machine assembled a strip of staples may be pushed into the machine along the top of the cutter bar 5, until the forward staple strikes the side of the plunger guideway 13. The plunger and straightener are then pushed downwardly by striking the hand piece or cap 19, to straighten and sever the staple, the straightener also functioning to prevent turning or tipping of the staple not only during the severing op eration but during the driving operation as well.

On the down motion of the plunger the cam 17 engages the arm 55 of the feeder cam 54 causing the latter to swing about its pivot carrying the feeder pawl 49 but not the hold-back rearwardly. Upon the up 'motion of the plunger the feeder pawl advances under the action of the spring 58 to feed the staple strip forward into position for the next severing and driving operation.

It is to be understood that the specific details of construction illustrated and described herein are illustrative rather than definitive and hence may be changed by those skilled in the art of stapling machines, within the purview of the invention.

lVe claim:

1. In a stapling machine, a housing, a shell removably mounted therein and a cutter bar spaced from the walls of said shell and removably supported thereby.

2. A stapling machine comprising a shell comprising two side members, a feeder cam. a feederpawl and a hold-back lever within said shell, pins attached to one of said side members and carrying said feeder cam, pawl and hold-back, said pins serving to properly position the two side members and to prevent their relative displacement in a plane transverse to said pins.

3. In a stapling machine, the combination of a shell comprising two side members, a

pin carried by one of said side members, a

i hold-back lever pivotally and removably mounted on said pin, a second pin carried by one of said side members, a feeder cam pivotally and removably mounted thereon, and a feeder pawl of channel formation pivotallyattached to said feeder cam, the flanges of said pawl straddling said holdback lever, the pivot pins supporting said hold-back lever and feeder cam, properly positioning the side members of the shell and preventing their relative displacemei'it in a plane transverse to said pins.

i. In a stapling machine, the combination of a shell, a hold-back lever, a feeder'pawl and a feeder cam pivotally mounted therein and removable therefrom, pins for properly positioning the two side members of the shell and preventing their relative displacement in a plane transverse to said pins and a spring cooperating with said feeder cam, each of said side members being provided with an opening for receiving said spring.

In a stapling machine, the combination of ashell comprising two side members, a hold-back lever mounted within said shell, a pin carried by one of said side members for pivotally and removably supporting said hold-back lever, a feeder pawl within said. shell cooperating with said hold-back lever, a feeder cam, a spring detaohably secured to said cam and cooperating there "with, a lug cooperating with said feeder cam spring, a pin on one of said side members for pivot-ally and removably supporting said lug and a spring for maintaining said hold-back lever in operative position, said spring being provided intermediate its ends with eyes for receiving the hold-back supporting pin, one end of said hold-back spring engaging said hold-back lever and the other end engaging the pin for supporting said lug.

6. In a stapling machine, the combination of a shell comprising two side members, pins carried by one of said side members for properly positioning the two side members and preventing their relative displacement, a cutter bar, a hold-back lever, a feeder pawl and a feeder cam removably and pivotally mounted on said pins within said shell, a housing adapted to receive said shell and the said cutter bar, hold-back lever, feeder pawl and feeder cam as a unit and means for removably securing said shell and its contained parts tosaid housing.

7. A stapling machine comprising a housing, a shell within the housing and a cutter bar, a hold-back lever, a feeder pawl,

a feeder cam and a locking lever for the hold-back lever mounted within said shell and removable therewith from the housing as a unit.

8. A stapling machine comprising a housing, a hold-back lever, a feeder pawl and a feeder cam mounted in said housing, a plunger and straightener co-operating with said first named mechanism, and a shell within said housing and carrying said feeder pawl and feeder cam, said shell and the pawl and feeder cam being removable from the housing as a unit, and said plunger and straightener being mounted in said housing and removable therefron'i as a unit.

9. A stapling machine comprising a housing, a cutter bar, a hold-back lever, a feeder pawl, a feeder cam, and a shell mounted in said housing and carrying said cutter bar,

hold-back lever, feeder pawl and feeder cam, I

said shell and the mechanism carried thereby being removable from the housing as a. unit,

a plunger and a st-raigl'itener mounted within said housing, a plunger spring and straight ener spring co-operating with said plunger and straightener, and said plunger and straightener and said springs being removable from said housing as a unit.

10. A stapling machine comprisin a housing provided with vertically extent ing guideways, aflanged plunger and a straightener mounted in said guideways and vertically movable therein, a cap carried by said. plunger, a spring surrounding said plunger and straightener, and adapted to engage the said straightener, and the upper ,part of said housing, asecond spring surrounding said plunger and adapted to engage the upper part of said straightener and the under side May, 1923.

ROMAN HENRY HEYN.

This specification signed this 4th day of May, 1923.

FRIDOLIN POLZER. 

